Why Do Steam Locomotives Puff Smoke?
The puff, chuff, or cho of a steam locomotive is caused by the last pressure of steam in the cylinders being exhausted into the chimney. The purpose of this is to create draught through the firebox.
What makes a steam locomotive chuff?
Steam passes to the piston valves which control admission of steam to the cylinders. ... The steam is exhausted through a nozzle and up through the smokebox into the stack. This action produces the “chuff chuff” sound heard when the locomotive is moving.
What Makes A Steam Locomotive Work? - Mid-Continent ...
What makes steam engines puff?
An outlet valve opens and the piston pushes the steam back through the cylinder and out up the locomotive's chimney (7). The intermittent chuff-chuff noise that a steam engine makes, and its intermittent puffs of smoke, happen when the piston moves back and forth in the cylinder.
How do steam engines work? - Explain that Stuff
Why do steam locomotives make so much smoke?
Like the others said, the white smoke is the actual exhausted steam, the black smoke is from the fire box exhaust, when a steam locomotive is working hard and the fireman is firing the engine with the maximum amount of fuel, be it oil, coal, wood, there will be black smoke produced by the fire.
What is the difference between white smoke dark smoke in steam ... - Quora
Why do steam locomotives puff black smoke?
A The color of exhaust you see coming out of a steam locomotive's smoke stack indicates how efficiently it is burning fuel. Darker or blacker smoke is an indication that small fuel particles (coal, wood, fuel oil, etc.) have made it through the firebox unburned and are therefore wasted.
Why does locomotive smoke change color? | Trains Magazine